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d21 Gas Price
x402
d21 Gas Price is a paid API for AI agents from draconic21-x402-api.onrender.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-12).
Returns live Base mainnet gas prices (legacy, EIP-1559 base fee, and suggested priority/max fee) plus a plain-transfer cost estimate, all in gwei, read directly from Base's public JSON-RPC.
Price / call$0.002
Success—
StatusUnknown
How this service works
Gas Price ($0.002): current Base gas market read live from Base's own public JSON-RPC, not a hosted gas-oracle vendor -- legacy gas price (eth_gasPrice), EIP-1559 base fee (latest block), and a suggested priority/max fee (eth_maxPriorityFeePerGas + a computed 2x-base-fee heuristic), all in gwei, plus a plain-transfer cost estimate. Base mainnet only. Body {} or { chain: "base" }. Check free /v1/gas_price/availability first.
Output
Returns a JSON object containing: legacy gas price (eth_gasPrice in gwei), EIP-1559 base fee from the latest block (in gwei), a suggested priority fee (eth_maxPriorityFeePerGas in gwei), a computed max fee using a 2x base fee heuristic (in gwei), and an estimated cost for a plain ETH transfer — all sourced live from Base's public JSON-RPC.
Example use cases
Pre-transaction gas check
“Before I send this transaction on Base, what's the current gas price and what should I set as my max fee and priority fee in gwei?”
Cost estimate for ETH transfer
“How much will a plain ETH transfer cost me on Base right now in gwei?”
Gas price monitoring for timing
“Is gas cheap on Base right now? Give me the live EIP-1559 base fee and legacy gas price so I can decide whether to send my transaction now or wait.”
Technical details
Endpoint
POSThttps://draconic21-x402-api.onrender.com/v1/gas_price?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need real-time, multi-format gas price data specifically for Base mainnet — including both legacy and EIP-1559 fee structures — without relying on a third-party gas oracle. Ideal for agents that need to set transaction fees programmatically or estimate transfer costs before executing on-chain actions on Base.
Side effects
- Base public JSON-RPC unavailable or slow — may return error or stale data
- Invalid chain value (anything other than 'base') returns an error
- Service cold-start latency on Render may cause timeouts
- Rate limiting or payment failure returns 402 or 429
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | Only 'base' is supported today; omit or pass "base". |
Tags
x402
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